Malicious PDF — malware analysis report

Static analysis result for SHA-256 879c638a86844ac6…

MALICIOUS

PDF

53.5 KB Created: 2020-08-24 07:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e35ee19352170652379ee32cdf6303d SHA-1: 52f5d7260e4f07d3775f915ddc7559c960cf94c1 SHA-256: 879c638a86844ac6409a50d304de4a1147cb26978b63a379365f32f88fb93ae2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external PDF files, masquerading as legitimate Google services to entice users. One of the primary links, 'https://ttraff.com/pify?keyword=google+docs+sheets+slides+et+forms', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the document's structure and embedded links point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=google+docs+sheets+slides+et+forms
    • http://files.sambacostumeparis.com/uploads/1/3/1/4/131406781/3662251.pdf
    • http://momufi.themightyla.com/uploads/1/3/0/7/130738531/8025392.pdf
    • http://tawefomul.hsiaoaiwang.com/uploads/1/3/1/4/131437246/baribivezokugif_sifipupelomotok_dovonov_rusepovuzuzuzan.pdf
    • http://files.provisopartners.com/uploads/1/3/0/7/130739652/rapupuwite-dukiz-kasajusus-napir.pdf
    • http://files.204north.com/uploads/1/3/1/3/131380308/4586425.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7301/1865/files/jizabeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/53163265712.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/15249200828.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8552/files/robedegini.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/45403517292.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4835/files/12013361919.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/safuginogatujato.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/dewapuguvom.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/91322117834.pdf
    • https://cdn.shopify.com/s/files/1/0444/1568/0679/files/oracle_business_intelligence_applications.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093e3.bin
e74b7dd971e5913540e0c0b4195112d80a651b49bd177c3dbe199f4542b06a1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93E3 5256 bytes
font_01_sfnt_off0000a5a0.bin
13a1863f31636a9aa90a531a73ac9ae30f887a2e0f06262841f6e748b058cbe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A0 10240 bytes

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